英文關鍵字
atmosphere
blue
chemical
chimney
climate
dirty
ecology
electricity
energy
enterprise
environment
factory
fuel
gas
industrial
industry
pipe
plant
pollution
power
siberia
sky
smog
smoke
smokestack
steam
technology
toxic
urban
winter
英文關鍵字
atmosphere
blue
chemical
chimney
climate
dirty
ecology
electricity
energy
enterprise
environment
factory
fuel
gas
industrial
industry
pipe
plant
pollution
power
siberia
sky
smog
smoke
smokestack
steam
technology
toxic
urban
winter